Using webcam for indoor air quality monitoring

C. J. Wong; C. K. Teo; M. Z. MatJafri; K. Abdullah; H. S. Lim

doi:10.1117/12.820329

27 April 2009 Using webcam for indoor air quality monitoring

C. J. Wong, C. K. Teo, M. Z. MatJafri, K. Abdullah, H. S. Lim

Proceedings Volume 7341, Visual Information Processing XVIII; 734110 (2009) https://doi.org/10.1117/12.820329
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

Nowadays application of webcam becomes more and more popular. Thus webcams are being developed to have better resolution but lower cost. This has motivated us to evaluate the suitability of using webcam for indoor air quality monitoring. This monitoring involved determining the concentration of particulate matter with diameter less than 10 micron (PM10). An algorithm was developed to convert multispectral image pixel values acquired from this camera into quantitative values of the concentrations of PM₁₀. This algorithm was developed based on the regression analysis of relationship between the measured reflectance and the reflected components from a surface material and the ambient air. The computed PM10 values were compared to other standard values measured by a DustTrak^TM meter. The correlation results showed that the newly develop algorithm produced a high degree of accuracy as indicated by high correlation coefficient (R²) and low root-mean-square-error (RMS). This has showed that Webcam can be used for indoor air quality monitoring.

Citation Download Citation

C. J. Wong, C. K. Teo, M. Z. MatJafri, K. Abdullah, and H. S. Lim "Using webcam for indoor air quality monitoring", Proc. SPIE 7341, Visual Information Processing XVIII, 734110 (27 April 2009); https://doi.org/10.1117/12.820329

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